X-Git-Url: https://gerrit.o-ran-sc.org/r/gitweb?a=blobdiff_plain;f=e2sim%2Fsrc%2FE2AP%2Fe2ap_message_handler.cpp;fp=e2sim%2Fsrc%2FE2AP%2Fe2ap_message_handler.cpp;h=39347a16f8cf95787072926b888bbe6d9374abe3;hb=1f1098ad65c5d27ab5aae14d55c5159dd1e8e01b;hp=0000000000000000000000000000000000000000;hpb=d09fbb9e5157cc0d30da61b79fd85cad314817ce;p=sim%2Fe2-interface.git

diff --git a/e2sim/src/E2AP/e2ap_message_handler.cpp b/e2sim/src/E2AP/e2ap_message_handler.cpp
new file mode 100644
index 0000000..39347a1
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+++ b/e2sim/src/E2AP/e2ap_message_handler.cpp
@@ -0,0 +1,388 @@
+/*****************************************************************************
+#                                                                            *
+# Copyright 2019 AT&T Intellectual Property                                  *
+# Copyright 2019 Nokia                                                       *
+#                                                                            *
+# Licensed under the Apache License, Version 2.0 (the "License");            *
+# you may not use this file except in compliance with the License.           *
+# You may obtain a copy of the License at                                    *
+#                                                                            *
+#      http://www.apache.org/licenses/LICENSE-2.0                            *
+#                                                                            *
+# Unless required by applicable law or agreed to in writing, software        *
+# distributed under the License is distributed on an "AS IS" BASIS,          *
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   *
+# See the License for the specific language governing permissions and        *
+# limitations under the License.                                             *
+#                                                                            *
+******************************************************************************/
+#include "e2ap_message_handler.hpp"
+#include <unistd.h>
+
+void e2ap_handle_sctp_data(int &socket_fd, sctp_buffer_t &data)
+{
+  //decode the data into E2AP-PDU
+  E2AP_PDU_t* pdu = new E2AP_PDU_t();
+
+  e2ap_asn1c_decode_pdu(pdu, data.buffer, data.len);
+
+  e2ap_asn1c_print_pdu(pdu);
+
+  int procedureCode = e2ap_asn1c_get_procedureCode(pdu);
+  int index = (int)pdu->present;
+
+  LOG_D("[E2AP] Unpacked E2AP-PDU: index = %d, procedureCode = %d\n",
+                            index, procedureCode);
+
+  switch(procedureCode)
+  {
+    case ProcedureCode_id_x2Setup: //X2Setup = 6
+      switch(index)
+      {
+        case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
+          LOG_I("[E2AP] Received X2-SETUP-REQUEST");
+          e2ap_handle_X2SetupRequest(pdu, socket_fd);
+          break;
+
+        case E2AP_PDU_PR_successfulOutcome: //successfulOutcome
+          LOG_I("[E2AP] Received X2-SETUP-RESPONSE");
+          e2ap_handle_X2SetupResponse(pdu, socket_fd);
+          break;
+
+        case E2AP_PDU_PR_unsuccessfulOutcome:
+          break;
+
+        default:
+          LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
+          break;
+      }
+      break;
+
+    case ProcedureCode_id_endcX2Setup: //ENDCX2Setup = 36
+      switch(index)
+      {
+        case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
+          LOG_I("[E2AP] Received ENDC-X2-SETUP-REQUEST");
+          e2ap_handle_ENDCX2SetupRequest(pdu, socket_fd);
+          break;
+
+        case E2AP_PDU_PR_successfulOutcome: //successfulOutcome
+          LOG_I("[E2AP] Received ENDC-X2-SETUP-RESPONSE");
+          //no handler yet
+          break;
+
+        case E2AP_PDU_PR_unsuccessfulOutcome:
+          LOG_I("[E2AP] Received ENDC-X2-SETUP-FAILURE");
+          //no handler yet
+          break;
+
+        default:
+          LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
+          break;
+      }
+      break;
+
+    case ProcedureCode_id_reset: //reset = 7
+      switch(index)
+      {
+        case E2AP_PDU_PR_initiatingMessage:
+          LOG_I("[E2AP] Received RESET-REQUEST");
+          break;
+
+        case E2AP_PDU_PR_successfulOutcome:
+          break;
+
+        case E2AP_PDU_PR_unsuccessfulOutcome:
+          break;
+
+        default:
+          LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
+          break;
+      }
+      break;
+
+    case ProcedureCode_id_ricSubscription: //RIC SUBSCRIPTION = 201
+      switch(index)
+      {
+        case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
+          LOG_I("[E2AP] Received RIC-SUBSCRIPTION-REQUEST");
+          //e2ap_handle_RICSubscriptionRequest(pdu, socket_fd);
+          e2ap_handle_RICSubscriptionRequest_securityDemo(pdu, socket_fd);
+          break;
+
+        case E2AP_PDU_PR_successfulOutcome:
+          LOG_I("[E2AP] Received RIC-SUBSCRIPTION-RESPONSE");
+          break;
+
+        case E2AP_PDU_PR_unsuccessfulOutcome:
+          LOG_I("[E2AP] Received RIC-SUBSCRIPTION-FAILURE");
+          break;
+
+        default:
+          LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
+          break;
+      }
+      break;
+
+    case ProcedureCode_id_ricIndication: // 205
+      switch(index)
+      {
+        case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
+          LOG_I("[E2AP] Received RIC-INDICATION");
+          // e2ap_handle_RICSubscriptionRequest(pdu, socket_fd);
+          break;
+
+        default:
+          LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU %d", index,
+                                    (int)ProcedureCode_id_ricIndication);
+          break;
+      }
+      break;
+
+    case ProcedureCode_id_resourceStatusReportingInitiation: //9
+      switch(index)
+      {
+        case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
+          LOG_I("[E2AP] Received RESOURCE-STATUS-REQUEST");
+          e2ap_handle_ResourceStatusRequest(pdu, socket_fd);
+          break;
+
+        case E2AP_PDU_PR_successfulOutcome: //successfulOutcome
+          LOG_I("[E2AP] Received RESOURCE-STATUS-RESPONSE");
+          break;
+
+        case E2AP_PDU_PR_unsuccessfulOutcome:
+          LOG_I("[E2AP] Received RESOURCE-STATUS-FAILURE");
+          break;
+
+        default:
+          LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU %d", index,
+                    (int)ProcedureCode_id_resourceStatusReportingInitiation);
+          break;
+      }
+      break;
+
+    case ProcedureCode_id_resourceStatusReporting: // 10
+      switch(index)
+      {
+        case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
+          LOG_I("[E2AP] Received RESOURCE-STATUS-UPDATE");
+          break;
+
+        default:
+          LOG_E("[E2AP] Unable to process message index=%d in E2AP-PDU %d", index,
+                    (int)ProcedureCode_id_resourceStatusReporting);
+          break;
+      }
+      break;
+
+    default:
+      LOG_E("[E2AP] No available handler for procedureCode=%d", procedureCode);
+      break;
+  }
+}
+
+/*
+Simply send back X2SetupResponse
+Todo: add more handling options (failure, duplicated request, etc.)
+*/
+void e2ap_handle_X2SetupRequest(E2AP_PDU_t* pdu, int &socket_fd)
+{
+  E2AP_PDU_t* res_pdu = e2ap_xml_to_pdu("E2AP_X2SetupResponse.xml");
+
+  LOG_D("[E2AP] Created X2-SETUP-RESPONSE");
+
+  e2ap_asn1c_print_pdu(res_pdu);
+
+  uint8_t       *buf;
+  sctp_buffer_t data;
+
+  data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);
+  memcpy(data.buffer, buf, min(data.len, MAX_SCTP_BUFFER));
+
+  //send response data over sctp
+  if(sctp_send_data(socket_fd, data) > 0) {
+    LOG_I("[SCTP] Sent X2-SETUP-RESPONSE");
+  } else {
+    LOG_E("[SCTP] Unable to send X2-SETUP-RESPONSE to peer");
+  }
+}
+
+void e2ap_handle_X2SetupResponse(E2AP_PDU_t* pdu, int &socket_fd)
+{
+  E2AP_PDU_t* req_pdu = e2ap_xml_to_pdu("E2AP_ResourceStatusRequest.xml");
+  // E2AP_PDU_t* req_pdu = e2ap_xml_to_pdu("E2AP_ResourceStatusRequest_bad.xml");
+
+  LOG_D("[E2AP] Created RESOURCE-STATUS-REQUEST");
+
+  e2ap_asn1c_print_pdu(req_pdu);
+
+  uint8_t       *buf;
+  sctp_buffer_t data;
+
+  data.len = e2ap_asn1c_encode_pdu(req_pdu, &buf);
+  memcpy(data.buffer, buf, min(data.len, MAX_SCTP_BUFFER));
+
+  //send response data over sctp
+  if(sctp_send_data(socket_fd, data) > 0) {
+    LOG_I("[SCTP] Sent RESOURCE-STATUS-REQUEST");
+  } else {
+    LOG_E("[SCTP] Unable to send RESOURCE-STATUS-REQUEST to peer");
+  }
+
+}
+
+/*
+Simply send back ENDCX2SetupResponse
+Todo: add more handling options (failure, duplicated request, etc.)
+*/
+void e2ap_handle_ENDCX2SetupRequest(E2AP_PDU_t* pdu, int &socket_fd)
+{
+  E2AP_PDU_t* res_pdu = e2ap_xml_to_pdu("E2AP_ENDCX2SetupResponse.xml");
+
+  LOG_D("[E2AP] Created ENDC-X2-SETUP-RESPONSE");
+
+  e2ap_asn1c_print_pdu(res_pdu);
+
+  uint8_t       *buf;
+  sctp_buffer_t data;
+
+  data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);
+  memcpy(data.buffer, buf, min(data.len, MAX_SCTP_BUFFER));
+
+  //send response data over sctp
+  if(sctp_send_data(socket_fd, data) > 0) {
+    LOG_I("[SCTP] Sent ENDC-X2-SETUP-RESPONSE");
+  } else {
+    LOG_E("[SCTP] Unable to send ENDC-X2-SETUP-RESPONSE to peer");
+  }
+}
+
+/*
+Simply send back hard-coded RICSubscriptionResponse
+Todo: add more handling options (failure, duplicated request, etc.)
+*/
+void e2ap_handle_RICSubscriptionRequest(E2AP_PDU_t* pdu, int &socket_fd)
+{
+  E2AP_PDU_t* res_pdu = e2ap_xml_to_pdu("E2AP_RICsubscriptionResponse.xml");
+
+  LOG_D("[E2AP] Created RIC-SUBSCRIPTION-RESPONSE");
+
+  e2ap_asn1c_print_pdu(res_pdu);
+
+  uint8_t       *buf;
+  sctp_buffer_t data;
+
+  data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);
+  memcpy(data.buffer, buf, min(data.len, MAX_SCTP_BUFFER));
+
+  //send response data over sctp
+  if(sctp_send_data(socket_fd, data) > 0) {
+    LOG_I("[SCTP] Sent RIC-SUBSCRIPTION-RESPONSE");
+  } else {
+    LOG_E("[SCTP] Unable to send RIC-SUBSCRIPTION-RESPONSE to peer");
+  }
+}
+
+void e2ap_handle_RICSubscriptionRequest_securityDemo(E2AP_PDU_t* pdu, int &socket_fd)
+{
+  E2AP_PDU_t* res_pdu = e2ap_xml_to_pdu("E2AP_RICsubscriptionResponse.xml");
+
+  LOG_D("[E2AP] Created RIC-SUBSCRIPTION-RESPONSE");
+
+  e2ap_asn1c_print_pdu(res_pdu);
+
+  uint8_t       *buf;
+  sctp_buffer_t data;
+
+  data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);
+  memcpy(data.buffer, buf, min(data.len, MAX_SCTP_BUFFER));
+
+  //send response data over sctp
+  if(sctp_send_data(socket_fd, data) > 0) {
+    LOG_I("[SCTP] Sent RIC-SUBSCRIPTION-RESPONSE");
+  } else {
+    LOG_E("[SCTP] Unable to send RIC-SUBSCRIPTION-RESPONSE to peer");
+  }
+
+  //Start sending RIC Indication
+  int count1 = 0, count2 = 0;
+
+  E2AP_PDU_t* indication_type1 = e2ap_xml_to_pdu("E2AP_RICindication_type1.xml");
+  E2AP_PDU_t* indication_type2 = e2ap_xml_to_pdu("E2AP_RICindication_type2.xml");
+
+  uint8_t *buf1, *buf2;
+  sctp_buffer_t data1, data2;
+  data1.len = e2ap_asn1c_encode_pdu(indication_type1, &buf1);
+  memcpy(data1.buffer, buf1, min(data1.len, MAX_SCTP_BUFFER));
+
+  data2.len = e2ap_asn1c_encode_pdu(indication_type2, &buf2);
+  memcpy(data2.buffer, buf2, min(data2.len, MAX_SCTP_BUFFER));
+
+  while(1){
+    sleep(1);
+    //type1
+    if(sctp_send_data(socket_fd, data1) > 0) {
+      count1++;
+      LOG_I("[SCTP] Sent RIC-INDICATION SgNBAdditionRequest Type 1, count1 = %d", count1);
+    } else {
+      LOG_E("[SCTP] Unable to send RIC-INDICATION to peer");
+    }
+
+    sleep(1);
+    //type2
+    if(sctp_send_data(socket_fd, data2) > 0) {
+      count2++;
+      LOG_I("[SCTP] Sent RIC-INDICATION SgNBAdditionRequest Type 2, count2 = %d", count2);
+    } else {
+      LOG_E("[SCTP] Unable to send RIC-INDICATION to peer");
+    }
+  } //end while
+
+}
+
+void e2ap_handle_ResourceStatusRequest(E2AP_PDU_t* pdu, int &socket_fd)
+{
+  //send back ResourceStatusResponse, followed by resource status update
+  E2AP_PDU_t* res_pdu = e2ap_xml_to_pdu("E2AP_ResourceStatusResponse.xml");
+
+  LOG_D("[E2AP] Created RESOURCE-STATUS-RESPONSE");
+
+  e2ap_asn1c_print_pdu(res_pdu);
+
+  uint8_t       *buf;
+  sctp_buffer_t data;
+
+  data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);
+  memcpy(data.buffer, buf, min(data.len, MAX_SCTP_BUFFER));
+
+  //send response data over sctp
+  if(sctp_send_data(socket_fd, data) > 0) {
+    LOG_I("[SCTP] Sent RESOURCE-STATUS-RESPONSE");
+  } else {
+    LOG_E("[SCTP] Unable to send RESOURCE-STATUS-RESPONSE to peer");
+  }
+
+
+  //send ResourceStatusUpdate periodically
+  E2AP_PDU_t* update_pdu = e2ap_xml_to_pdu("E2AP_ResourceStatusUpdate.xml");
+
+  uint8_t       *update_buf;
+  sctp_buffer_t update_data;
+
+  update_data.len = e2ap_asn1c_encode_pdu(update_pdu, &update_buf);
+  memcpy(update_data.buffer, update_buf, min(update_data.len, MAX_SCTP_BUFFER));
+
+  while(1) {
+    // e2ap_asn1c_print_pdu(update_pdu);
+
+    if(sctp_send_data(socket_fd, update_data) > 0) {
+      LOG_I("[SCTP] Sent RESOURCE-STATUS-UPDATE");
+    } else {
+      LOG_E("[SCTP] Unable to send RESOURCE-STATUS-UPDATE to peer");
+    }
+
+    sleep(1);
+
+  }
+}